Chlorination of zinc oxide between 723 and 973 K

被引：13

作者：

De Micco, G. ^{[1
,2
]}

Fouga, G. G. ^{[3
,4
]}

Bohe, A. E. ^{[3
,4
]}

机构：

[1] Comis Nacl Energia Atom, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Nacl Cuyo, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Consejo Nacl Invest Cient & Tecn, CONICET, Buenos Aires, DF, Argentina

[4] Univ Nacl Comahue, Ctr Reg Univ Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2007年 / 38卷 / 06期

关键词：

D O I：

10.1007/s11663-007-9089-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The kinetics Of the chlorination of zinc oxide has been studied by thermogravimetry between 723 and 973 K. The starting temperature for the reaction of ZnO with chlorine is determined at about 498 K. The influence of gaseous flow rate, sample mass, temperature, and chlorine partial pressure in the reaction rate is analyzed. It is established that the reaction occurs under mixed control, being pore diffusion coupled with chemical reaction as the rate controlling step. An apparent reaction order of 0.5 with respect to chlorine partial pressure was determined. A kinetic model for the chlorination reaction of porous solids under mixed control determined an intrinsic reaction order of zero with respect to partial pressure of chlorine and an intrinsic activation energy of 249 kJ mol(-1.)

引用

页码：853 / 862

页数：10

共 31 条

[1] Kinetics of chlorination and carbochlorination of pure tantalum and niobium pentoxides [J].